Concealing-screen for visible type-writers.



H. R. KNOWLES. coNcEALmo SCREEN Foa vlssu; TYPE wwwa.

APPLICATION FILED MAY9|1917 ge Patentedept. 18, 1917.

HENRY B'. KNOWLES, OF RIDLEY PARK, PENNSYLVANIA..

CONCEALING-SCREEN FOR VISIBLE TYPE-WRITERS.

i specnication of Letters Patent.

Patented Sept. t8, i917.

Application led May 9, 1917. Serial No. 167,489.

To all whom it may concern:

Be it known that I, HENRY R. KNowmis, a citizen of'the United States, residing at Ridley Park, in the county of Delaware and State of Pennsylvania, have invented certain new and useful Improvements ink Concealing-Screens for Visible.l Type-Writers; and I do declare the following to be a full,

clear, and exact description of the inveni tion, such as will enable others skilled in the art to which it appertainstomake and use the same.

This invention relates generally to typewriting machines, and more particularly to certain new and concealing screens machines.

The primary object of-the invention is to provide a screen which will enable an operator to conceal the typewritten sheet in the machine from the gaze of unauthorized persons.

Another object provide a screen of this character which 1s ymounted so as to enable the operator to throw it into effective position,or to throw it out of the way when inserting or removing thesheet, or correcting errors.

A further object of the invention is to provide an improved and efficient meansfor detachably securingthe screen to the carfor visible typewriting riage of the typewriter.

A still further object of the invention is useful improvements in of the linvention is to' to generally improve upon devices o f this l character by the provision of a simple',

strong, comparatively durable and inexpen. .A

sive construction, one

which will be efficient and reliable in operation, and 'well adapted 1` to the purpose for which it is designed.

With these and numerous other objects in view, the invention consists of certain novel features of construction, and the combination and arrangement of parts as will be hereinafter fullv described and claimed.

In the accompanying drawings-forming a part of the application'a'nd wherein the preferred embodiment y, of .(the; invention is.

illustrated Figure 1 is a perspective lViewv of a conshowing a device conventional typewriter,

structed in accordance wi h this invention applied thereto and in-its concealing positionj. y

Fig. 2 is a similar viewl showing thedevice in its non-concealing position;

of the device de- Fig. 3 is a front View.

pexplained, the screen is inthe brackets y 3 'ends ofthe rod a on which the paper guides of the typewriter slide.

5 for a purpose to Ledge of the front lwardly, and extending` longitudinally from tached from the typewriter, a portion of forward section being broken away;

Fig. 4 'is a transversey sectional view of a portion of the device, illustrating the mannervin which one of the bracketsis removably secured to thetypewriter.

In specifically describing the construction of the invention shown in the drawing above briefly described, similar reference characters will be placed on corresponding parts throughout the several views and reference will be herein made to the various elements by their respective indices.

To this end the numeral 1v designates a U-shaped supporting member, the arms of which are disposed in parallel relation and form a pair of brackets. Extending inwardly from one of the edges of the arms 3 at points adjacent their lower ends are notches 4, the lower edges of which at their innermost ends are provided with shoulders Fixed uponthe exterior sides of the arms 3 are stop members which may be made in a variety of ways, but which preferably consist `of laterally lextending plates 6. These plates 6 are provided with downwardly inclined resilient fingers 7 having upturned ends.

Connected to be hereinafter described.

the intermediate portionv of the member l is a concealing screen' com-v posed of a rear section 2 and-a front section 8, at least one of'these sections being pivotally mounted with respect to the member 1. Inv the present instancethe front section 8 is shown pivotally mountedwith -respect to the member 1 by being hinged to the front edge of the rear section 2. The sections 2 and 8 are composed of extremely thin material preferably tin or other light metal,l

and have their edges crimped around a wire frame 9. The rear'edge of the rear section 2 is curved downwardly, while the forward section 8 is curved downforward edge of the one side adjacent this 10, the purpose of front section is a lug "which will be hereinafter described.

vIn using a device-constructed as above placed aboveV the carriage of the typewriter, the notches 4 being engaged with the The resilient` fingers or ends 7 'of the laterally extending plates carried bv the bracketsfrest upon :-i l` the plates 6` onthebracket adapted to be.

i 1o place. .It will be noted that mounted on the the horizontal end bars` of the typewriter-'l carriage. -The proportions and. locationof the Various parts of the brackets arev such that when the ends of the rod a are disf -posed in the slots 4 and the plates 6 are resting upon the bars b, the ends 7 of the nteriorvof the carriagel adjacent one of the bars b. v is a'leverforadjusting the spacing mechanism-of the'typewriter. The forwardmost finger 7 has been omitted from dispos d at this side of the carriage so as to not interfere with this lever.

When the device is assembled upon the typewriter in this manner, it will be seen that the screen is spaced slightly above the platen and over the parts of the carriage and does not interfere in any manner-with the successful operation of the machine. The lug 10 arranged at the forward' edge of the front section 8 of the screen rests upon aportion of the rforward part of the 1 .typewriter carriage when this section is inv `its lowermost or' concealing position. The .purpose-of this lug is to prevent the section from dropping intocontact with any of the Working parts ofthe machine.' y The screen iny thi positioncovers `and conceals the .typewritten page from the gaze of unauthorized persons-@Should the operator at any time desire to insert or vremove a sheet from the machine or correct errors,.the for-y -ward section 8 of the screen may be raised and thrown out of the'way. 'The entire screen may bey quickly and easily removed from the machine by a slight downward pressupon the upper ends of the brackets and simultaneous rearward movement of the same so as to disengage the notches 4 from the ends of the rod a.

From the foregoing description, taken in connection with the. accompanying drawings, it will be seen that the objects of thel invention have been effectively carried out as an extremely simple and inexpensive,yet

a comparatively strong' and durableconcealing screen for visible typewriters has been provided. Typewriters do not' have to be especially adapted for application of the invention thereto, and the, same may be quickly and easily attached to or removed therefrom. y i

As numerous changes in form, proportion, and in the-minor details of construction may be resorted to without departing from the spirit of this invention, it is to be understood that I do not wish to be limited to the precise construction herein shown and described.

y r`vmacerie vthe horizontal end bars of the prlsing two brackets provided with notches 1n one of their edges adapted to receive the rod on which the paper guides of a typewriter slide, a'pair of plates extending latf l lI'claim:-- V v 1. The combination with a vislble type-' writer,4 of a concealing screen detachably secured to the carriage thereof and dis-.j

posed above the same, said screen being comtion being disposedover the forward part of the-carriage. v

2. The combination with a visible typei u writer, of a concealing .screen disposed above the carriage of the same, said screen being. composed of two pivotally movable sectionsA and a pair y of brackets having 80 notches in one of their edges for receiving the ends of the rod on which the paper guides of the typewriter slide, and laterally extending stops on the brackets resting upon y carriage. 3. The combination with a visible type-v writer, of a concealing screen disposed above the carriage of the same and composed of two pivotally movable sections and a pair of brackets, said brackets having notches in one of their edges for receiving the ends of the rod on which the paper guides of the typewriter slide, vand plates extending laterally from the exterior sides of said brackets and having. resilient end portions y resting upon the horizontal end bars of the carriage for supportingsaid brackets and 'maintaining the ends of said rod disposed hin said notches.

in one of their edges adapted toreceive the l rod on which the paper guides of a typewriter slide, stop members extending laterally from one` of the sides of said brackets and adapted to rest upon the horizontal end barsy of the typewriter, and a concealing screen attached to said brackets. f I 6. A device of the class described comerally-from. one of the sides of said brackets and provided with resilient end yportions l adapted to rest upon the horizontal endbars of the typewriter, and a concealing screen attached to said brackets. i 7. A device, of the class described comprising a fU-shaped member, a concealing screen composed of front and rear sections attached to saidmember, the arms of said member being provided with notches in one of their edges adapted to receive the rod on my hand in the presence of two subscribing which the paper glides of (it tyewriir' witnesses.

slide and sto mem ers exten in atei-a y l fronti one ofpthe sides of said rms and HENRY R KNOWLES'- 5 adapted to rest upon the horizontal 'end Witnesses:

bars of the typewrlter. HIRAM HATHAWAY, Jr.,

In testimony whereof I have hereunto set MARTHA H. MELICK. 

